Hornady Superformance 7mm Remington Magnum 139 Gr GMX 20 Round Box


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Increase your rifle’s performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy.

Superformance® uses progressive propellants that take your favorite SST® bullets to levels of performance that are simply unattainable with conventional ammunition.

Product Features
Proven Hornady® Bullets: Superformance® ammunition is loaded with Hornady® SST® bullets for the ultimate in performance, no matter what the game.

Progressive Hornady® Powders: Superformance® Propellants are the heart of Superformance® ammunition and usher in a new era of performance.

Case and Primer: Like all Hornady® ammunition, our Superformance® rounds use the highest quality cases and primers available. Consistent components translate to consistent shooting in the field.


  • IT IS FAST: 100 to 200 fps faster than conventional ammunition.
  • IT IS ACCURATE: Uncompromising accuracy without increased felt recoil.
  • IT IS CONSISTENT: Unfailing performance across a broad range of temperatures.
  • IT IS VERSATILE: It is safe for use in all firearm types, including semi-autos, lever guns and pump actions.

Test Barrel: 24″
Muzzle Velocity: 3190 fps
Muzzle Energy: 3140 ft-lbs


7mm Rem Mag



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Please note: International Shooting Supplies does not ship to addresses outside Canada.